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VLANs (virtual LANs) Configuration

A virtual LAN (Local Area Network) is a logical subnetwork that can group together a collection of VM instances and offers data connectivity between each other. Specifically, VLANs support is intended to group together VM instances which running on the same or separate nodes and communicate with each other most frequently, providing overall performance, scalability and security network benefits.However,this configuration demands the network interfaces that are attached to these VMs to be tagged with the same VLAN TAG. Following sections describe two (2) different VLAN configurations that can be supported by our platform. The first one is the typical VLAN service and the second is the wired VLAN service.

Setting up a typical VLAN

Each VLAN provides data link access between VMs connected to a network interface configured with the same VLAN TAG.

At a high level, network administrators can set up new VLAN in a virtual network interface visiting Network Configuration section as follows:

  1. Click on "create network"

  2. Choose only one of two available physical interfaces (NIC0 or NIC1) in which this VLAN configured virtual network interface will be attached.

Choose vlan nic

  1. Choose a DHCP type of this network

  2. Enable "CREATE VLAN?"

Create VLAN

  1. Type a desired VLAN Tag

VLAN Tag

Netids for VLAN networks have BIT [63] set. BITs [11:0] of VLAN netids hold the VLAN Tag. VLAN Tag 0 is reserved. Hence, valid VLAN Tags range from 1 to 4095.

The next steps in order to complete this virtual network are exactly the same as described in the network configuration section.

Setting up a wired VLAN

Wired VLAN configuration redirects tagged incoming data traffic to one specific VM which is listening for that traffic.In this case, wired VLAN support tags the traffic to a VLAN TAG and sends these data to a specific VM that matches this VLAN TAG bypassing entirely the NexVisor forwarding tables.At the moment, if the VLAN is wired, only one virtual interface (VIF) can exist for this network. In order to establish a virtual network interface configured as wired VLAN , network administrators should follow below steps:

  1. Click on "create network"

  2. Choose only one of two available physical interfaces (NIC0 or NIC1) in which the VLAN will be attached.

Choose vlan nic

  1. Choose a DHCP type except for Internal. If the VLAN is wired, then the DHCP need to be static or external.

  2. Step 4 and 5 remain exact the same as previous configuration.

  3. Enable wired VLAN

vlan is wired nic